Added new function, import_backup_file_silently
Changed everything that prints stuff to check for a constant first.
Backup_flush checks a different constant, this is so that output can still
get flushed to the browser when necessary but not print <li>s everywhere.
Please test this!
This patch allows the much requested selection of individual instances of modules within a course to backup and restore.
It needs A LOT of testing and probably some prettyifying too.
by the restore process. Such conversion is performed for
every backup file prior to 2005041100.
Wiki internal links are dinamically changed and then,
converted to Markdown. Bye, Wiki! ;-)